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Differences Between Stem Gate Valve And Dark Bar Gate

Gate valve can be classified stem gate valve and rising stem gate valve according to stem structure.
Screw of rising stem gate valve is invisible, but stem gate valve is able to see the screw. When open or close the rising stem gate valve, steering wheel and stem are connected together relatively immobile, it is through rotation of the stem at a fixed point to drive the valve lifts up and down to complete the opening and closing of the gate. Stem gate valve raise or lower stem through the stem and the steering wheel to drive. 

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